Final answer:
Social withdrawal and having few close friends may be diagnosed as a symptom of a psychological disorder if it is persistent, distressing, and disabling.
Step-by-step explanation:
The behavior pattern described in the question is most likely to be diagnosed as a symptom of a psychological disorder if it is persistent, distressing, and disabling. This means that if the social withdrawal and lack of close friends are ongoing, causing significant distress to the individual and impairing their ability to function in daily life, it may be indicative of a psychological disorder.